Certified Test Report
ERMCO Components Inc.
8.3/15KV 9F54VDE Expulsion Fuse
Interrupting Test
Report No. ECI-042103EXF
B1-5A
2004006 February 2004
March 2003
Purpose of Test
To verify that 8.3KV/15KV rated 9F54VDE type fuse links to be manufactured by
ERMCO Components Inc. will perform according to published ratings.
Method of Test
Fuses were installed in the High Voltage bushings in an oil filled Pole Type transformer
tank. Two bushing units were used with one bushing having the fuse installed and the
other bushing used to complete the circuit.
Test Conditions
The tests were conducted in the outdoor test facility at the F. Gano Chance Research
Laboratory in Centralia, MO. Circuits were constructed using the generator and standard
components available at the laboratory. The circuits had X/R values between 4 and 5.
Fuses were tested at 8.3KV and 15 KV. The 8.3KV setups produced 3500 Amperes; the
15KV 2000 Amperes. Both values are asymmetrical resulting from closing the circuits to
provide maximum asymmetry. A backup breaker was set to interrupt in 5 cycles in case
of fuse failure.
Tests Performed
A total of 12 tests were performed: 3 on fuse model 9F54VDE104, 3 on 9F54VBE404
and 6 on 9F54VDE604.
Test Results
In all cases the fuse interrupted the short circuit current after less than 2 cycles of current.
No re-strikes occurred during the remaining cycles. The transformer cover vented as per
it’s design intent and the bushings maintained their integrity.
B1-5B
2004006 February 2004
2
Conclusion
The 9F54VDEx04 series of expulsion fuses are suitable for application in Pole Type
transformers when mounted in porcelain high voltage bushings with the end of the
bushing and the fuse immersed in transformer oil.
Finn Hassing
Senior Product Engineer
B1-5C
2004006 February 2004
3
Certified Test Report
ERMCO Components Inc.
8.3/15KV 9F54VDE Expulsion Fuse
Melting Test
Report No. ECI-021204EXF
2004007 February 2004
February 2004
B1-6A
Purpose of Test
The purpose of this series of tests was to verify that the 9F54VDE series of bushing
mounted expulsion fuses have melt time characteristics as shown on published curves.
Method of Test
The fuse to be tested was mounted in a high voltage bushing using methods identical to
the industry practice. The bushing was mounted in a pole type transformer cover which in
turn was installed on top of a transformer tank which was filled with oil to immerse the
fuse per specification. The wire end of the fuse was attached to a second bushing
mounted on the transformer tank to allow for completion of a circuit through the fuse.
The bushings were connected to a regulated current source and instrumentation to
measure current and time to melt was applied. To perform the actual test the power
source was programmed for a specific current, power applied and time to melt and actual
current measured and recorded.
Results
The results as recorded are shown in the table below:
1
Fuse Number Amp
1
12.8
2
12
3
12.6
4
20
5
24
6
23
7
15
8
9
2
Sec Amp
21
17
21.5 21
21.6 22
0.4 22.4
0.42 30
0.45 44
4
21
45
28
Curve Number
3
4
Sec Amp Sec Amp
4
45
0.3
48
2
44 0.25 33
1.7
44
0.3
36
2.5
23
4
27.5
0.6 26.4 2.5 28.3
0.2
28.2
1.6
43
0.2
37
0.7
40
5
6
Sec Amp Sec Amp Sec
0.7
49
1.5
50
3
1.7
50
1.6
48
3.4
1.7
50
1.5
51
3
4.7
54
2.5
3.4
43
10
3.7
44
5.7
0.8
1.6
0.9
Analysis of Results
In order to analyze the results each pair of current versus time was compared to GES8304C and GES-8314B. All test values fell between the minimum melt and the maximum
total clearing curves.
B1-6B
2004007 February 2004
2
Conclusion
Due to the limitations of the test equipment it was not possible to perform a
comprehensive test series as would have been required to establish the complete curve for
each fuse. Since the fuses tested incorporate identical elements and similar construction
and dimensions as the fuses which were tested to establish the curves originally our
judgment is that the data obtained was sufficient to fulfill the purpose of the test which
was to verify the TCC curves of the 9F54VDE fuses.
Finn Hassing
Senior Product Engineer
B1-6C
2004007 February 2004
3